645290200 has 48 divisors (see below), whose sum is σ = 1502091360. Its totient is φ = 257808000.

The previous prime is 645290197. The next prime is 645290209. The reversal of 645290200 is 2092546.

645290200 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (645290209) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 244890 + ... + 247510.

It is an arithmetic number, because the mean of its divisors is an integer number (31293570).

Almost surely, 2^645290200 is an apocalyptic number.

It is an amenable number.

645290200 is an abundant number, since it is smaller than the sum of its proper divisors (856801160).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

645290200 is a wasteful number, since it uses less digits than its factorization.

645290200 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3868 (or 3859 counting only the distinct ones).

The product of its (nonzero) digits is 4320, while the sum is 28.

The square root of 645290200 is about 25402.5628628294. The cubic root of 645290200 is about 864.1418198555.

The spelling of 645290200 in words is "six hundred forty-five million, two hundred ninety thousand, two hundred".